Wide-band O2 sensor Supply Voltage

[bcroe at juno.com]

One of the characteristics of the DIY-WB is that you need
nearly full (charging) battery voltage to keep the heater
circuit in the "output enabled" mode.  This will vary from 
sensor to sensor.  This is no problem with the engine 
running (alternator charging), if your wiring is in good 
shape.  To run on the bench with a battery, you might 
need to connect a small battery charger.  WB circuits
have been built that avoid this, but the price is more 
complexity.

The calibration resistor function was added to the circuit
in May; turns out to be just a voltage divider.

Bruce Roe

On Tue, 16 Oct 2001 22:32:13 -0400 "Ray Drouillard" 
<RayLists at quixnet.net> writes:

> it looks like someone figured out
> how to use the calibration resistor that comes with the sensor. 

> Ray Drouillard
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